Question

What are natural indicators? Give examples. What are universal indicators?

Answer 1

Natural indicators

• Indicators are helpful in determining the acidic or basic nature of a given substance.
• When indicators are added to acidic or basic solutions, they change their color accordingly.
• Natural indicators are those which can be extracted by plants.
• For example: lichens, turmeric, china rose, and red cabbage.

Universal indicators

• Universal indicators are made up of various different indicators. These indicators provide different colors at different pH values.
• They help in estimating how much acidic or basic a substance is.
• Litmus is the most basic universal indicator.